Life is too long to be doing things like that.
I hammered all the way through my first century. At the end, I was wiped out, mildly hypothermic and I didn't really have any pleasant memories of the experience.
When I did my last century, I was riding with a co-worker who was doing his first one. We rode slower than what I felt should have been my proper pace.
This century is known for it's climbing (Barlow Trail Century for folks in Portland), and at the end, I felt great. I'd helped my friend finish a century (double good on him because he was also diabetic). I rode with some great people, including a 65-year old who had me in stitches for 20 miles with some of her stories.
I know which line I want to be in next time.
re-cur-sion ri'-ker-shen n: see recursion